Wheeled scraper



Patented Aug. 23, |898.

.R NEw P, w.; Pwd.. MS@ S D M .En Ln XPP-.m WMM Wm. m 3. 9 5 9, 0 6 m N (No Model.)

l illllllllllllllkh .....Vlllllllll Ilich N0. 609,593. Patented Aug. 23, |898. W. X. SIMPSON.

WHEELED SCRAPER.

(Application filed Sept. 16, 1897.)

(No Model.)

2, Sheets-Sheet 2.

NTTED STATES PATENT OFFICE.

VILLIAM X. SIMPSON, OF AURORA, ILLINOIS.

WH EELED SCRAPER.

SPECIFICATION forming part of Letters Patent No. 609,593, dated August 23, 1898.

Application filed September 16, 1897. Serial No. 651,892. (No model.)

To @ZZ whom t may concern:

Be it known that I, WILLIAM X. SIMPSON, a citizen of the United States, residing at Aurora, in the county of Kane and State of Illinois, have invented a new and useful Wheeled Scraper, of which the following is a specification.

My invention relates to improvements in scraper-pansfor wheeled Scrapers; and the object of the invention is to provide an automatic lifting attachment for the scraper-pan by means of which said pan may be raised by the draft to an elevated position and engage With its locking-latches, in-which position the pan is held by the latches until it is dumped in order to discharge its load.

A further object of the invention is to provide an automatic lifting device with means which serve to limit the play or adjustment of the lifting-bars and to relieve said liftingbars from lateral or sidewise strain.

A further object of the invention is to simplify the construction of the lifting devices for the scrapenpan in a manner to promote the strength and durability of the parts and to increase the efficiency of operation.

With these ends in view the invention consists in the combination, with a scraper-pan, of a draft-bail pivoted thereto, a lifting-lever attached to the pan at the pivotal connection of the bail thereto, and means for sustaining the lever in a position above the pan-bottom, whereby said lifting-lever may be dropped into engagement with the ground and as the draft-bail pulls on the pan to lift the same into a position for engagement with the latch by which the scraper is sustained in its raised position until it is desired to dump the pan.

The invention further consists in a peculiar construction of the lifting bar or lever; and it finally consists in the novel combination of devices and in the construction and arrangement of parts, as will be hereinafter fully described and claimed.

To enable others to understand my invention, I have illustrated one embodiment thereof in the accompanying drawings, forming a part of this specification, and in which- Figure 1 is a side elevation of arscraperpan with my automatic lifting device applied thereto and showing the Ysameinthe raised position which it normally occupies when the pan to its carrying position for engagement f with the latches ordinarily provided on wheeled Scrapers for sustaining the pan and its load in the raised position. f Figs. 5 to 8, inclusive, represent a modified construction of my lifting mechanism applied `to an ordinary scraper-pan, Figs. 5 and? being views in side elevation, Fig. 6 being a plan view, and Fig. 8 a detail perspective View of one of the lifting-levers.

Like numerals of reference denote corresponding partsin all the figures of the drawlngs. y f

l designates the scraper-pan of an ordinary wheeled scraper. No novelty is herein claimed for the scrapenpan, its latch, or locking device, nor for the wheeled scraper per se.

My invention resides, primarily, in the provision of a lifting mechanism which is combined with the scraper-pan in a manner to utilize the draft of the machine in raising the pan to a positon to engage with the latch. The automatic lifting attachment consists of one or more bars or levers 2, a controllinglever 3, and means which operatively connect the lifting bar or lever with the Vcontrollinglever. As shown in the drawings, thescraper1 pan is provided at each side thereof with a lifting bar or lever 2, andthesebars or levers are fulcrumed at points intermediate of their length to the side walls of the pan, near the forward upper edges of said pan. The fulcra for the lifting-levers are indicated at 4f, and in the practical embodiment of the invention each lever may beenlarged or thickened to form a hub or boss 5, through which the pivotbolt 4 may pass in order to connect the lifting-lever to the side of the pan. In order to strengthen the side Wall of the pan at the point where the lever is fulcrumed thereon, I may provide the wall with a bearing in the form of a plate, which may be suitably attached to thepan or be made as an, integral part of the wall thereof, andthis bearing is apertured or perforated for the passage ofthe pivotal bolt of the lifting-lever.

IOO

Each lever is formed in a single piece of plate or bar metal, preferably of steel. The end of the lever opposite to the fulcrnm 4 is drawn out or widened laterally, as at 6, and then doubled and bent back upon itself to provide the widened enlarged foot 7, after which the plate or bar is bent substantially at a right angle to form the widened penetrating heel 8. This construction of the free end of the lifting-lever provides a good solid support for the lever upon the ground when "it is thrown into operative position for the purpose of raising the pan as the machine is drawn forward, and the heel of the lever is adapted to penetrate or sink into the ground under the weight of the scraper-pan and its load and thus prevent the lever from slipping on the ground as the lnachine moves forward.

In some styles of wheeled Scrapers it is preferable, by reason of the arrangement of the various parts of the scraper-machine, to employ the lifting-bars arranged on opposite sides of the scraper-pan, as shown in the drawings, and under these conditions I prefer to connect the lifting-levers by means of a cross or tie bar 9. This tie-bar is united in any suitable way to the bent parts 6 and 7 of the two levers, and said tie-bar is arranged, when the levers are in their normal raised positions, to lie in advance of the open front end of the scraper-pan. In other styles of scraper-pans used on other makes of wheeled scrapers it is not advisable to employ the tie bar or rod 9. Hence I employ a single liftinglever, fulcrumed at an intermediate point of its length to one side of the scraper-pan.

In the embodiment of my invention shown in the accompanying drawings each liftinglever is provided with a short arm above its fulcrum 4, and to this short arm ispivotally attached a link 10, which extends along side of the scraper-pan backwardly to the rear closed end thereof.

On the rear side of the scraper-pan is journaled in suitable bearings 11. a transverse rock-shaft 12. The ends of this rock-shaft project from opposite sides of the scraper-pan, at which points the rock-shaft carries the crank-arms 13, and said rock-shaft is further provided with a controlling-lever 3,'which is rigidly attached to said shaft and is adapted to be operated in any suitable way-as, for instance, by a trip or by hand-in order to rock or turn the shaft 12 in its bearings 11. The rear ends of the links 10 are curved or bowed upwardly, as at 10, and the rear eX- tremities of these bowed parts of the links are pivoted to the crank-arms 13 of the rock-shaft 12. When the lifting-levers occupy their normal raised positions, the lever 3 is lowered against the rear closed side of the scraperpan, and the crank-arms 13 of the rock-shaft are thrown backwardly to extend substantially at right angles from the rear closed side of said pan, thus drawing the links 10 downward and causing the bowed parts 10a of said links to iit snugly over the rock-shaft. This shown by Fig. 3.

construction and arrangement of the rockshaft, its crank-arms, and the bowed parts of the links serve as a means for locking the lifting-levers in their raised positions, thus dispensing with separate latches for sustaining the lifting-levers in their normal raised positions.

In connection with the lifting-levers I employ the arc-shaped guides 15, one of whichl is fastened to each side of the scraper-pan adjacent laterally to the lifting-lever. The ends of the arc-shaped guides are offset to-provide flanges 16, which are fitted against the side of the scraper-pan and are bolted or otherwise united rigidly thereto; but thel curved part of the guide between its offset and fastened end is spacedlaterally with relation to the side wall of the scraper-pan to accommodate the lifting-lever between the guide and the scraper-pan. The spaced guide is arranged concentric with the pivot or fulcrum 4 of the lever, and said guide serves to hold the lifting-lever in position and to reduce to a minimum any sidewise or lateral strain on the lever. 4'

The draft on the pan is obtained by means of a bail 17 or by draft-chains. In the drawings I have shown a bail having its rear ends attached pivotally or loosely on the bolts 4, that serve as the fulcra for the levers, and the opposite end of this bail is constructed in any suitable well-known way for the attachment of the draft appliance.

In the drawings I have shown the links 10 pivoted to the short arms of the lifting-levers above the fulcra thereof; bntit is evident that lthese links may be pivoted to the lifting-levers on the opposite side of their fulcra, or, in other words, below the fulcra.

When the scraper is in service and the scraper-pan is being filled with earth, the lifting-barsare held in the inclined raised position shown by Fig. 1 of the drawings by the crank-arms of the rock-shaft and by the bowed parts ofthe-links fitting upon said rock-shaft.- When the scraper-pan is filled, the rock-shaft is released by turning the lever 3 in any suitable way, thus throwing the links 10 forward and allowing the free ends of the lifting-levers to drop down to the inclined position The heels of the lifting-levers penetrate the ground and serve as the fulcra by which the pan is lifted as the machine moves forward, so that the pan engagesA with the latch, which sustains the pan and the load in the carrying position. As the pan is raised and the machine moves forward the lifting-levers are turned to the inverted position shown by Fig. 4, and said levers are thus held up out of the way until the pan is dumped,` after which the rock-shaft is reversed and the levers are allowed to fall and return to their normal positions ready for operation again.

From the foregoing description, taken in connection with the drawings, it will be observed that I have provided an automatic IOO IIO

IZO

lift-in g mechanism for raising the scraper-pan by the draft of the machine and that under normal Vconditions the lifting mechanism is'held and latched in the raised position free from contact with the ground. In order to raise the pan it is only necessary to release the lifting mechanism, after which the said lifting mechanism operates by gravity and by the draft to raise the pan automatically to an elevated position for engagement with its latch. This entirely obviates the necessity heretofore experienced of having one or two men to raise the pan in order to latch itin its carrying position.

I give to the lifting ba'r or lever such shape that when the heel has raised the pan as high as it can be lifted the/ lifting-lever rolls or rocks forward on the toe and is raised still higher, thus giving an easier lift to the pan than when an abrupt shape is formed on the foot or the lever.

In the wheeled scraper shown in the drawings the main carrying-frame has a latch (indicated at 20) to engage the pan when raised; but the style of latch is immaterial, as no novelty therefor or for the scraper is claimed herein. i

In the embodiment of the invention illusstrated by Figs. 5, 6, and 7 I have illustrated the invention as applied to a scraperpan without employing latches for holding the lifting devices in their raised positions. In this embodiment of the invention the lifting-levers 2 are arranged on the-sides of the scraper-pan, outside of the segmental guides 15 thereof, and to relieve the lifting-levers from lateral or sidewise strain I provide the keepers 18, which are fastened securely on the inner sides of the levers and are bent to slidably engage with the segmental guides4 15. These keepers 18 are fastened to the lifting-levers at points below the fulcra of said levers, and these keepers slide or move freely over the guides 15 as the levers 2 are swung back and forth. A rock-shaft 19 is journaled in suitable bearings fastened to the rear end of the scraper-pan, and said rock-shaft is bent at its ends to provide crank-arms 20a, the free ends of which are pivoted at 21 to the rear ends of the links 22, the latter being operatively connected with the lifting-levers 2 at points between the keepers 18 and the fulcra 4. This rock-shaft 19 is provided with a single operating-lever 23, which is fastened to the shaft to occupy a position substantially at right angles to the cranks 20. Said lever 23 is fastened on or attached to the shaft in central relation to the pan, and the end of said lever 23 is adapted to bear or press against the pan either above the shaft when the pan is raised and the lifting-levers are lowered or below the shaft when the pan is lowered and the lifting -levers raised, as shown, respectively, by Figs. and 5. The cranks of the rock-shaft are arranged to throw past the center of the shaft when the levers 2 are raised to the position shown by Fig. 5, and when said levers are raised out of operative position and project toward the rear closed end of the pan, and in either extreme position of said lifting-levers and the crankarms of the rock-shaft the controlling-lever 23 bears against the closed rear side of said pan for the purpose of forming a lock to hold said' lifting-levers in either of their adjusted positions. The described construction and arrangement of parts obviate the necessity of separate latches to hold the lifting-levers in either of their adjusted positions, and the lifting mechanism is thus simplified and rendered more efficient and reliable in service.

I'am aware that changes in the form and proportion of parts and the details of construction may be made by a skilled mechanic without departing from the spirit or sacrificing any of the advantages of the invention. I therefore reserve the right to make such modifications and alterations as clearly fall within the scope of the invention.

Having thus described the invention, what is claimed as new is- 1. The combination with a scraper-pan, and a draft-bail pivoted thereto, of alifting-lever attached to the pan at the pivotal connection of the bail thereto, and means for sustaining the lever in a position above the pan-bottom, whereby said lifting-lever may be dropped into engagement with the ground and the draft-bail pulls on the pan to lift the same.

2. The combination with a scraper-pan, and a draft-bail pivoted thereto, of a lifting-lever attached to the pan at the pivotal connection of the bail thereto, and an adjusting and locking mechanism mounted on the heel of the pan and operatively connected with the lifting-lever, said locking mechanism arranged to engage with the pan to be held thereby, substantially as described.

3. The combination with a scraper-pan, of a controlling-lever, a lifting-lever fulcrumed on the pan near its open front end and arranged to project normally beyond said pan, and a link connecting the controlling-lever to the lifting-lever, substantially as and for the purposes described.

4. The combination with a scraper-pan, of guides fastened to the side of said pan, lifting-levers fulcrumed to the pan and arranged between the same and the guides, and a controlling-lever operatively connected with the lifting-lever.

5. The combination with a scraper-pan, of a rock-shaft journaled thereon and provided with crank-arms, lifting-levers fulcrumed to the pan and projecting normally beyond the open front end thereof, links pivoted to the lifting-levers and having bowed ends pivoted to the cranks of the rock-shaft, and a controlling-lever carried' by the rock-shaft.

6. In a scraper, a lifting-lever having its free end bent to provide the foot and the projecting heel, combined with a pan to which IOO IIO

IIS

one end of said lifting-lever is fulcrumed, and means for operating said lifting-lever, as and for the purposes described. x

7. The combination with a scraper-pan, of lifting-levers fulcrumed near one end to the sides of the pan and provided at their free `ends With penetrating heels, a draft appliance connected to the fulcra of said liftinglevers, and a cranked rock-shaft linked to the lifting-levers at one side of the fulcra thereof, as and for the purposes described.

8. The combination Withascraper-pan, and a draft-bail attached thereto, of lifting-levers each pivoted at one end on said pan and projecting at its free end beyond said pan, a rock- WILLIAM X. SIMPSON.

Witnesses:

CHARLES E. POWELL, WILLIAM-Z. BEAUPRE. 

